The speed of a moving car is 20 m/s . Calculate its speed in km/h

Answers (1)

1km = 1000m 

So  1m = 1/1000  km

1 hour = 3600s 

So 1s = 1 / 3600 h

So 20 \frac{m}{s}=20*\frac{\frac{1}{1000}Km}{\frac{1}{3600}h}=20*\frac{18}{5}=72 \frac{Km}{h}

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